Machine for coating webs with adhesive



May 6 1924.

I A. M. BECKER MACHINE FOR COATING WEB S WITH ADHES IVE Filed Jan. 27. 1922 2 Sheets-Sheet 1 INVENTO ,1 6 ATTORNEY May 6, 1924. r

A. M. BECKER MACHINE FOR COATING WEBS WITB ADHESIVE Filed Jan, 27. 1922 2 Sheets-Sheet 2 Patented May 6,1924.

] UNITED STATES PATENT orrlca.

AUGUST 1!. BECKER, OF NEW YORK, N. Y., ASSIGNOB OF ONE-HALF ro m'rm STE IN- THAII', OF.NEW YORK, N. Y.

MACHINE FOR COATING WEBS WITH ADHESIVE.

Application filed January 27, 1922. Serial in. 532,125.

To all whom it may comm:

Be it known that I, AUeUsr M. BECKER, a citizen of the United States, and resident of New York city in the county of New York and State of hlew York, have invented certain new. and useful Improvements in Machines for Coating Webs with Adhesive, ofwhich the following is a specification.

My invention is directed to a particular arrangement, organization and construction of machines in which an adhesive substance is spread upon the surface of a sheet or web of material, so that it may be pasted or glued to a desired surface which it is to cover, and the novel features of the invention are particularly applicable for use in a glue applying machine using a rotating drum or cylinder for distributing or applying the glue as a coating on the sheet or web. In some of the glue machines heretofore in use, much dithculty'has been experienced with the lodging of'lumps or pieces of material occurring in the adhesive, upon the scraper device of the drum and thereby producing a thin place or streak in the coating of glue on the drum which is to be transferred to the sheet under treatment, and to this extent causing defects in the work of the machine. It has also been found most diflicult to prevent the adhesive from accidently reaching the ends of the distributing-drum, also its bearings, and the ends of the scraper means and other partsadjacent the same, the accidental accumulation of which adhrsive causes'the clogging of the machine, de ays the coating process and often times requires the stopping of the machine and taking it down to clean the various parts from the accumulatedadhesive. These drawbacks are overcome by my present im rovements and rid the scraper means 0 any defects arising from the presence of lumps or foreign material in the adhesive-layer, as well as guard the various parts from accidental accumulation of the adhesive material, so that the machine can be run continuously without interruption and valuable time thereby saved in its operation, as well as a better productbeing turned out by the improvement in the operation of the machine itself. Other important features of my improvements are the ready and nice adjustment of the doctorroll, the means for directing the web or bodying my improvements, with certain portions of some of the parts broken away at the left-hand end of the view.

Fig. 2, is an enlarged view of a section of the machine, at the left-hand end, the plane of the section beingindicated by line 2-2, in Fig. 1.

Fig. 3, is an enlarged transverse vertical sectional view, of the machine.

Fig. 4, is a view in elevation of the lefthand end of the machine.

. Fig. 5, is a view in elevation of the righthand end of the machine.

Fig.6, is an enlarged transverse vertical sectional view of part of the machine showing the adjustable bearings for the doctorroll, the adjusting means and locking device and the scraper device.

Fig. 7. is a perspective view of one of the adjustable bearings with the scraper device mounted thereon.

Fig. 8, is a view of the locking meansfor the adjustable bearing, and shown in section.

Referring to the drawings, in which like numerals. of reference designate like parts throughout, 1 indicates a removable tank or vessel for containing the adhesive substance 2, which may be kept hot by the water-bath adh sive with it as the drum turns on its.

ings 10 andll, arranged in the flanges 12 and 13, at the respective ends of the tank 1. The trunnions 8 and 9, of the drum 6, are

provided respectively with cylindrical en-' largements or bosses 14 and 15, whlch serve to keep the ends of the drum spaced from the end walls of the tank and also act as surfaces upon which the scraper moans acts, as hereinafter described.

One end of the drum 6*, is provided with a crank 16, for turning the drum by hand to operate the machine and the same end of the drum. has a gear-wheel 17, fixed to the trunnion 9, and meshing with a pinion 18, on the end of the transverse shaft 19,

which is mounted in hearings in the enda pinion-wheel 30, fixed to the opposite end from where the pinion 18, is located, and the wheel 30, gears with an idle pinion, 31, turning on a stud 32, projecting from the outside of one of the end-frames 20, and the idle-pinion 31, meshes with and drivesa gear-wheel 33, which is keyed on the shaft 34, of the doctor-roll 35, the ends of said shaft 34, being mounted in horizontally sliding bearings 36 and 37, respectively,

which are mounted adjustably' on fixed parts 38 and 39, respectively, of the opposite ends of the tank 1. These adjustable bearings are constructed alike, and a description of one will servefor both. Each of said bear-.

ings consists of an elongated bracket with its under side constructed to slide on the fixed part of the side of the tank on which it is mounted and on which fixed part is a removable guide-screw 40, ,which passes loosely through a vertical slot 41, in the bracket and this arrangement'serves to keep the bracket in its place and to guide it in its in and out movements. A forked or notched place 42, in the bracket receives the axle or end of the drum shaft 34. and serves as a bearing element for the same. A link 43, is pivoted at one end at 44. to the bracket and at the other end the link is pivoted to an adjusting-lever 45. at a point 46, which is located between the free end of said lever and the axis of motion of the pivot-pin 47. of the lever the said pivot-pin turning in a perforation 48, in a lug 4S, op the part 56. The pivot-pin is formed with screw-thread 50. at its outer end for receivinga 5i, and the nut aaeacei bears against the outer end of a loose sleeve 52, which at its inner end abuts against the lug 49, so that by turning down the nut the sleeve 52, is jammed against the fixed lug and thereby acts to lock the pivotpin 47,"of the lever 45, against rotation, and in this way the adjustment of the connected bearing horizontally is controlled and held in locked position. The adjusting-lever 45, depends in a position that is out of the way and at the same time easily accessible to the operator, and its lower end is provided with a weight and handle 53. The pivotal connection 46, of the link 43, with the adjusting-lever 45, being below "that of the pivot-pin 47, the adjusting action .is quickened in the movement of the lever outwardly or inwardly and this movement when imparted to the connected bearing the doctor-roll may be made to press with considerable force or moved away therefrom the desired distance, depending upon the thickness of the coating or film of adhesive which the operator wishes the drum to present to the web or sheet under treatment. When the doctor-roll, which acts as means for scraping the surplus adhesive from the drum and regulating the thickness of the layer of adhesive which is passed on to the web, is to be adjusted, the binding-nuts 51, of each of the adjustinglevers are released and the operator grasps one lever in each hand and simultaneously moves it in or out, according to whether the roll is to be adjusted closer to or further away from the periphery of the drum. When the desired adjustment has been cffected, the binding-nuts are turned down hard so as to lock the lever and connected parts in adjusted positions. The connecting link 43, being horizontal and in line with the bearing-bracket the latter is guided in its sliding movements at the outer end by the link,'so that the single guide-slot 41, and screw 40, at the inner end of the bracket is sufficient to give a smooth action to the bracket in sliding in and out, and prevents pinching or binding of the same. As the bearing brackets are each controlled by a lever 45, they are moved without ditficulty and with much ease because of the leverage exerted by the swinging levers. and this is an advantage in a structure of this kind and afi'ords quick action in maka well be anced movement of the parts,

the weight of which is to be considered, as

the doctor-roll and the brackets are made of solid metal in the machines which I have constructed. Theen'd' flanges 12 and 13, of the tank, are notched at '54 and 55', for the reception of the respective ends of the doctor-roll axle '34, and these notches are slightly wider than the diameter of the axle in order that the axle may have sufficient lateral play therein to permit of the full range of adjustment of the doctor-roll when the bearin -brackets are adjusted. The end of the axle 34, on which the gearwheel 33, is-secured projects a,- suflicient distance beyond the end of the tank through the notch in the flan e 12, to receive said gear, as shown particu arly in Figs. 1 and 2.

The counter-shaft 19, which receives its motion from the shaft of the drum, starting with the large gear 17, and the gearing is so arranged that the doctor-roll 35, to which the motion is finall transmitted, is revolved in the opposite irection to that of the drum, as indicated by the arrows in Fig. 3, and this relative movement of the doctorroll serves to carry away from the periphery of the drum, a lump of adhesive or any foreign material that might be brought up from the supply 2, by the revolution of the drum which is submerged at its lower part therein, and at the same time the lump is crushed betweenthe two peripheries of the moving parts. If the crushed lump does not fall off the roll with the drippin adhesive and again comes in contact wit the drum periphery, the operator hasaccess to the doctor-roll at all times and he may readily remove the lumpy pieces.

In order to prevent the adhesive .substance from creeping over the ends of the doctor-roll and reaching the axle and bearings thereof, I provide the respective ends of the periphery with drain-grooves 57 and 58, see Figs. 1, 2, and 3, which extend around the peripher and are comparatively deep so that surp us adhesive may find its way into the same and be scraped therefrom and caused to drop back into the tank, by means of my novel form of scraper 59, one of which is mounted on each of the adjustable bearings 37. This scraper is made of resilient sheet-metal which is bent so as to provide a flat attaching-part 60, a lateral downwardly projecting flange or lip 61, with an upwardly rojecting finger or strip 62, at one end, t e finger being slightly curved as shown, while at the other end is another downwardly projecting flange 63. An at.- taching hole 64, is formed in the flat part 60, and a clamping-plate 65, having a SlIIlllar hole .66, is laid on the part 60, and the scraper secured in fixed position by means of a screw 67, which is screwed into the upper side of the sliding-bearing 37, a suit- I able flat surface being provided thereon for the reception of said flat part, so that when k the screw 67, is turned down hard it clamps the plate 65, firmly against the support and holds the scraper securely in positron. This scraper device is so constructed and arranged that the flange or lip63, of each,

scrapes the periphery of the drum-hubs or bosses 14, and 15, while the main portion of the length vof the edge offlange 61, acts upon the end of the drum 1 ingbetween the boss thereof and the perip ery, while in addition to this scraping action, the lower edge of the flange near one end also scrapes the inner wall of the drain-groove at the end of the doctor-roll, and the upward] projecting finger. 62, engages the outer W8. 1 of said groove and scrapes it, at the same time the forward edge or end of the flange 61 acts upon the bottom surface of the said groove with a scraping action. In this way, a thorough scraping of these several surfaces is provided andv as the drain grooves are quite deep and comparatively narrow, the surplus adhesive is so concentrated thereby that the scraping action of the device quickly serves to rid the parts of the adhesive which may find its way thereto, and the scrapings are caused to at once drain directly back into the supply in the tank below. By this arrangement of scraping at multiple points so as to keep the several" which a detailed description is given of the series of superposed guide-fingers 71, mounted on the arbor 68, so as to be laterally adjustable thereon and provided with removable spacing -'members 72, mounted on said arbor and U-shaped in cross-section, the said guide-fingers presenting small contacting surfaces to the back of the web 7, after being coated by the drum and is being raised therefrom for removal.

A pair of Web-feeding rollers'73 and 74, are mounted parallel with the drum slightly to one side, and rotate in suitable bearin s in the respective end-places 20 and 21, an the lowermost roller 74, has at one end a fixed pinion 76, which is in mesh with the pinion 18, which drives the counter-shaft 19, and this pinion 18, drives the pinion 76, and the roller 74, in the same direction as the drum slida'bly of the drum periphery, and that this arrangement makes the bite 'of'the rollers lie in an oblique plane which ractically contains the axis of rotation oftie drum. By this arrangement, the web is fed tothe drum surface in a downwardly inclined direction, so

' that when the lcading'cdge of the web strikes the drum it is carried upwardly thereb while the on-coming portion of the web to lowing is continued to be fed in a downward direction, thus causing the web to make more intimate contact with the drum than otherwise and to ive it a huggin tendency on the drum perlphery, and this eature is here.-

shown in quite a pronounced form.

The web orsheet to be treated, is led to the feed-rollers by aninclined shelf or table 7 8, which extends across the machine parallel with the feed rollers and with its lower edge overhanging the lowermost roller 74, and with the plane of its upper surface such that when prolonged it would cut the roller 74, and the edge of the table is slightly removed from the roller. The underside of the table 78, is provided with a pair of widely spaced brackets 79 and 80, with their lower ends bent into flat parts 81 and 82, respectively,

so as to fit upon the flat surface of the upper side of the end-frames 20 and 21, which latter are provided with fixed pins 83 and 84, for taking into perforations 85 and 86, formed in the feet or parts 81 and 82, respectively,,of the brackets, thus providing a detachable mounting for the table. The inclined position of the table 78, permits the operator to readily view the doctor-roll as it turns in contact with the drum and to have manual access to the roll for removing any lumps or foreign matter therefrom during the action of the machine.

Upon the rear tie-rod 70, I mount a series of web-lifting devices 87, which in the main are constructed and o erate like those set forth in In said pen i ng application for patent, but ave a difierent actuating spring. The spring here shown comprises a leaf 88, having its lower end riveted to the tie-rod and with its upper end bent over hookshaped with the free end thereof bearing against the rear edge of the lifter 87, the forked lower end of which at 89, rides on the tie-rod loosely, so that the spring acts to constantly force the fingers 90, of the lifterainst the periphery of the drum, from a w ich the pointed fingers of the lifter may anaacei the two tie-rods, and this superstructure is detachabl mounted upon the ends of the tank, sot at it ma be readily removed for the purpose of ta mg the machine apart when desired.

My improved machine may be used with hot "or cold adhesive liquid and is most efficient in coating sheets or webs of paper or cloth, used in books or semi le card cases or for gluing labels or likearticles, and in fact may-be used for applying paste or glue to any of the many kinds of articles in which pasted sheets are em loyed.

I wish to be un erstood limit my invention to the articular constructions and arrangements erein set forth, as it is manifest that various changes may be made in the same, without, however, departing from the spirit of the invention.

The operation of my improved machine is substantially the same as that described in my said pending application for patent. The web of material 7, which is to have one surface coated or covered with a layer of adhesive, is moved down the shelf 7 8, and introduced between the feed-rollers 7 3 and .7 4, the axes of which are arranged about the same distances from the periphery of the drumfi, so that the bight between the rollers will direct the web substantially towards the axis of the drum thereby giving a positive movement of the web against the drum periphery at a low point thereon so as to cause-the web to move fully in contact with the upwardly moving drum, in order to insure a thorough and uniform coating of the web with the adhesive by the contacting surface of the drum. This upper and uncoated side of the Web is engaged by the super-posed series of guide-fingers 71, which present knife-like edges thereto and avoid an extended surface of contact at such points which might be accidently smeared with adhesive, so as to reduce the chances of getting adhesive on the wrong side of the web. The continued turning of the drum carries the web around to' the lifting fingers 90, of the set of lifters 87, and these fingers serve to raise the web from the surface of the drum, and permit the operator to insert his finger between the pairs of fingers 90,

seize the end of the web and pull it towards him from the drum.

Having thus described my invention, what combination of a rotary adhesive-distribut ing drum and means for supplying it with adhesive substance, a rotary doctor-roll disposed with its axis arallel with the axis of said drum and ad ustable with respect to said drum, adjustable bearings in which said doctor-roll is mounted to rotate, and adjusting means for said bearings each having a lever and link connection for effecting the adjustment of the roll with respect to the drum.

3. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance thereto, an adjustable rotarydoctor-roll having its axis parallel with that of said drum, adjustable journal-bearings for the respective ends of said doctor-roll, an adjusting lever for each of said bearings and pivoted link connections between the lever and bearing and said connections for effecting the adjustment of the bearing.

4. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying the same with. an adhesive substance, an adjustable doctor-roll having its axis disposed parallel with that of said drum, adjustable journalbearings for said doctor-roll, a'pivoted adjusting-lever and connections between the same and a journal-bearing of said roll, said connections including a link jointed to said lever at a point between the axis of the pivot of the lever and the free end thereof.

5. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance thereto, a rotary doctor-roll having its axis parallel to that of said drum, adjustable journal-bearings inwhich said doctor-roll is mounted to rotate, each of said bearings being provided with a pivoted adjusting-lever and means for binding said pivot to hold the lever in adjustment, and

connections between each lever and bearing.

6. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying the same with adhesive substance, a rotary doctor-roll arranged with its axis parallel with thatvof said drum, said doctor-roll to secure by Letters Patdista e from said drum, the sai bea be ng controlled in its adjustment by a lever, a ivot-arbor secured to said lever and mounted to rock in a fixed part and havin its end threaded, a sleeve mounted on sai arbor and abutting said fixed art, a binding-nut on the arbor-thread or engaging 'the end of said sleeve, and connections between said mounting and said lever.

7 In a machine of the class described, the combination of a rotary adhesive-distributing, drum, a' rotary doctor-roll having its axis parallel. with that of said drum, adjustable ournal-bearings in which said doctor-roll is mounted and each, bearing be,- ing provided with a depending adjustinglever, a link connecting the respective levers with the respective bearings, for effecting the adjustment of said bearings.

8. In a machine of the class described,

the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance to the drum, a rota doctor-roll having its axis arranged para lel with that of said drum, the said two members being adjustable with, respect to each other laterally to vary the distance between the two, and a scraper device arranged between the respective ends of said drum and roll and serving to scrape the adhesive from such ends inall positions of relative adjustment of said, drum and doctorroll and prevent the said adhesive from accidently reaching other places than the periphery of said drum.

9. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive thereto, a rotary doctor-roll arranged with its axis parallel with that of said drum and the two parts being relatively adjustable laterally with respect to each other. the respective ends of said doctor-roll beyond the point of periph eral contact with said drum being provided with annular grooves for diverting and also engaging theend of said doctor roll and its axle and serving to remove the adhesive from said engaged points and keep the same from the bearings.

11.- In a machine of the class described,

the combination of a rotary adhesive-disftributing' drum and means for supplymg adhesive substance thereto, a rotary doctorroll disposed with its axis parallel with that of said drum, adjustable bearings for the respective ends of said doctor-roll, scraping means mounted upon each of said bearings and each means engaging the end of said drum and its axle, also the end of said roll and its" axle, and means for holding the said bearings in adjusted positions.

12. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive thereto, a rotary doctor-roll mounted in parallel relation with said drum and the two being relatively adjustable to vary the distance between them, draingrooves formed at the respective ends of said doctor-roll. and a scraper device at each end of said drum and roll mounted on the movable part by which said relative adjustment is efiected and moving in response to the relative adjustment of said drum and roll and acting to scrape the ends of said drum and roll.

13. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance thereto. a rotary doctorroll arranged with its axis parallel with that of'said drum, and said roll "and drum being relatively adjustable to vary the distance between their K peripheries, the said doctor-roll having a peripheral draingroove at each end, scraper means at the respective ends of said drum and roll and comprising a plate of resilient metal with a downwardly extending flange on twovof its adjacent edges for scraping the end of the drum and roll, respectively, the end of one of said flanges being provided with an. upwardly extending finger and said end and finger being adapted to take into the draingrooveof said roll and scrape the same.

14. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying the same with adhesive substance, said drum being provided with journals at its respective ends. a cylindrical enlargement at each end of said drum disposed between the drumend and the said journal, and a scraper at each end of said drum engaging the drumend and the periphery of said cylindrical enlargement and acting to scrape the adhesive from said surfaces.

Signed at New York city. in the county of New York and State of New York, this 25th day of January. A. D. 1922.

AUGUST M. BECKER. 

